/*
 * Copyright (c) 2011 - Georgios Gousios <gousiosg@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package gr.gousiosg.javacg.stat;

import org.apache.bcel.classfile.ClassParser;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.function.Function;

/**
 * Constructs a callgraph out of a JAR archive. Can combine multiple archives
 * into a single call graph.
 *
 * @author Georgios Gousios <gousiosg@gmail.com>
 */
public class JCallGraph {

    /**
     * 生成java调用关系图
     * @param classfiles
     */
    public List<String> genericJavaCallGraph(List<File> classfiles,List<String> includePackages) {
        ConcurrentMap<String,File> cacheFiles=new ConcurrentHashMap<>();
        List<String> methodCallsAll=new ArrayList<>();
        try {
            Function<ClassParser, ClassVisitor> getClassVisitor = (ClassParser cp) -> {
                try {
                    return new ClassVisitor(cp.parse(),includePackages);
                } catch (IOException e) {
                    throw new UncheckedIOException(e);
                }
            };
            for (File file : classfiles) {
//                System.out.println(zip.getPath());
                FileInputStream fileInputStream = new FileInputStream(file);
                ClassParser cp = new ClassParser(fileInputStream, file.getName());
                List<String> methodCalls = getClassVisitor.apply(cp).start().methodCalls();
                for(String methodCall:methodCalls){
                    if(!methodCallsAll.contains(methodCall)){
                        methodCallsAll.add(methodCall);
                    }
                }


            }
            return methodCallsAll;
        } catch (FileNotFoundException ex) {
            throw new RuntimeException(ex);
        }
    }

}
